uuid_generator.hpp

// Helper class to generate unique ids.
// from https://stackoverflow.com/questions/24365331/how-can-i-generate-uuid-in-c-without-using-boost-library
 
#ifndef EILE_MIT_WEILE_UUI_GENERATOR_HPP
#define EILE_MIT_WEILE_UUI_GENERATOR_HPP
 
 
#include <random>
#include <sstream>
 
class uuid_generator {
    public:
        static std::string GenerateUuidV4() { 
            std::stringstream ss;
            std::random_device rd;
            std::mt19937 gen(rd());
            std::uniform_int_distribution<> dis(0, 15);
            std::uniform_int_distribution<> dis2(8, 11);
 
            int i;
            ss << std::hex;
            for (i = 0; i < 8; i++) {
                ss << dis(gen);
            }
            ss << "-";
            for (i = 0; i < 4; i++) {
                ss << dis(gen);
            }
            ss << "-4";
            for (i = 0; i < 3; i++) {
                ss << dis(gen);
            }
            ss << "-";
            ss << dis2(gen);
            for (i = 0; i < 3; i++) {
                ss << dis(gen);
            }
            ss << "-";
            for (i = 0; i < 12; i++) {
                ss << dis(gen);
            }
            return ss.str();
        }
};
 
#endif //EILE_MIT_WEILE_UUI_GENERATOR_HPP